Grinding wheel



Dec. 4 1923. 1,476,515

B. F. HOWARD GRINDING WHEEL Files Ma 10. 1921 Biffan a I'd,

Patented Dec. 4; 1923.;

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ear-ent re Application filed n y-m,

To all whom-it may concern: c

Be it known that I, BERNARD F. HOWARD, a citizen of the United States,residing at- Morrisville, in the county of Lamoille and State ofVermont, have inventedccrtain new and useful Improvements in GrindingWheels; and I do hereby declare the followinp, to be a full, clear, andexact description t the intention, such as will enable others skilled inthe artto which it appertains to make and use the same.

This invention relates to grinding devices of the type embodyingaplurality of spaced connected rings utilizing an abrading-material suchas emery. 5 r

The invention has for itsgobject to prevent waste oi the grindingmaterial, insure a practically uniform wear of the grinding wheel and toobviate subsequent finishmg to remove emery trails or marks occasionedby the use of the ordinary emery wheels.

Other objects and advantages will be apparent and suggest themselves asthe nature of the invention is understood.

ment of the invention it is to be understood that invadapting the sameto meet dilterent conditions and requirements, various changes in thform proportion and minor details or" construction may be resorted towithout departing from the nature of the invention.

Referring to the accompanying drawings v 1 points corresponding with thecrossing be-- forming a part of the specification,

Figure 1 isa top plan view of a grinning wheel embodying the invention,

Figure 2 is a section thereof on the linev w-m of Figure 1, r p -v VFigure 3 is a perspective view of the driver, and v Figure 4 is anenlarged cross section of one of the grinding rings. 7'

- Corresponding and like parts are referred to in the followingdescription and designated in'thc several views of the drawings by likereference characters. 7

The grinding wheel comprises a plurality of concentric rings 1 whichareconnected by means of a plurality of radially disposed bars 2. Therings 1' and bars 2 preferably form parts of a single casting. Each ofthe rings 1 ilarestoward its top s1de,-form1ng overhanging portions 3 atopposite sides, indicated most clearly "in F igure 4. overhangingportions 3 prevent the emery or abrading material from creeping up- 'Adriver isprovided 'n con While he drawings illustrate an embodi- 1921.Serial No. 468,268.

The

wardly along'the sides of the ringsand lodg ing on'the top thereof." Theouter sides of the overhanging portions 3 curve laterally"- and turnthe.abrading material and cause the same to fallback upon the work, therebyI requiring less attention on the part of the operator to keep the wheelproperly supplied with abrading material. There may be any number of tiebars 2 for the 'grindingrings 1 and, as shown, there are four bars 2 andthe same are equally spaced; w

I 'unction with the grinding wheel and consists of a ring' 4 and anarched bar 5 diametrically disposed.

Spaced lugs 6 are formed on the upper side of the arched bar 5 forconvenience of at- I (aching the wheel to. the grinding machine in amanner well understood Thering 4: is provided 'in'its' circumferentiallength with transverse openings 7 to receive bolts, or fastenings 8 bymeans of which the driver is attached to the grindingwheel. 'The tiebars 2 are formed on their upper sides with lugs 9 which are positionedto extend along a side of the ring 4, said lugs being apertured toreceive the fasteningsifS. It is observed that the driver has a fourpoint contact with the grinding; wheel; each of such tween the ring tand each of the tie bars 2;

The pressure is thus distributed and the grinding wheel caused to wearuniformly and with the further advantage that the work is freefrom'e'mery trails or marks and :does not require subsequent finishingfor re moval of the same. The driver may be readlily detached and usedrepeatedly in connec-.

tegral wit-h'sa-id rings and disposed c0mo plet'ely above theiruppersurfaces, avplural- 1 ity of lugs integral with the bars and spacedequi-distantly from and about t lienaxes Of i by multiple-point contactis efi' e ctedflwith' in presence of twowitn esses'.

said driver tO B-XGI't uniform pressure onthe V v 7 I wheel, and bothside Walls" of each SlOt-GX- I 3 7' 3 K T 5 tnding upwardlyandla'tera'lly toward each Vithses'f

